Turn the vehicle to the OFF (LOCK) mode, then wait 5 seconds or more.
NOTE: Do not open and close the driver's door.
?4.
Turn the vehicle to the ON mode.
?5.
Check for DTCs with the HDS.
DTC Description
DTC
Freeze Frame
U0029-00 CAN Communication Failure (Ch1 Bus OFF)
U0047-00 CAN Communication Failure (Ch2 Bus OFF)
Is DTC U0029-00 or U0047-00 indicated?
YES
The failure is duplicated. Go to step 2.
NO
Intermittent failure, the system is OK at this time. Refer to intermittent failures troubleshooting. If the freeze data/on-board snapshot of this DTC is recorded, try to reproduce the failure under the same conditions with the freeze data/on-board snapshot.?
2.
DTC check (CAN gateway system):
DTC check (CAN gateway system)
?1.
Check for CAN gateway system DTCs with the HDS.
DTC Description
DTC
Is DTC indicated?
YES
Go to indicated DTC's troubleshooting.?
NO
Go to step 3.
3.
F-CAN circuit communication check:
F-CAN circuit communication check
?1.
Select the FUNCTION TEST in the CAN gateway with the HDS, then select the F-CAN Bus Connected Unit Check.
Which result is indicated?
Electric brake booster (Bus A) is Not Available
Go to step 4.
Electric brake booster (Bus B) is Not Available
Go to step 5.
Electric brake booster (Bus A and B) is Available
Check for loose terminals and poor connections in the electric brake booster 26P connector. Check for any authorized service information related to the DTCs or symptoms you are troubleshooting. If they are OK, replace the electric brake booster.?
4.
Open wire check (F-CAN A_H, F-CAN A_L lines):
Open wire check (F-CAN A_H, F-CAN A_L lines)
?1.
Turn the vehicle to the OFF (LOCK) mode with driver's door open.
?2.
Wait for 3 minutes.
NOTE: Do not close the driver's door.
?3.
Disconnect the following connectors.
Electric brake booster 26P connector
CAN gateway 12P connector
?4.
Check for continuity between test points 1 and 2.
Test condition
Vehicle OFF (LOCK) mode
Electric brake booster 26P connector: disconnected
CAN gateway 12P connector (female terminals) No. 9:
Is there continuity?
YES
The F-CAN A_H and F-CAN A_L wires are OK. Check for loose terminals and poor connections in the electric brake booster 26P connector. Check for any authorized service information related to the DTCs or symptoms you are troubleshooting. If they are OK, replace the electric brake booster.?
NO
Repair an open in the wire between the electric brake booster and the CAN gateway.?
5.
Open wire check (F-CAN B_H, F-CAN B_L lines):
Open wire check (F-CAN B_H, F-CAN B_L lines)
?1.
Turn the vehicle to the OFF (LOCK) mode with driver's door open.
?2.
Wait for 3 minutes.
NOTE: Do not close the driver's door.
?3.
Disconnect the following connectors.
Electric brake booster 26P connector
CAN gateway 12P connector
?4.
Check for continuity between test points 1 and 2.
Test condition
Vehicle OFF (LOCK) mode
Electric brake booster 26P connector: disconnected
CAN gateway 12P connector (female terminals) No. 5:
Is there continuity?
YES
The F-CAN B_H and F-CAN B_L wires are OK. Check for loose terminals and poor connections in the electric brake booster 26P connector. Check for any authorized service information related to the DTCs or symptoms you are troubleshooting. If they are OK, replace the electric brake booster.?
NO
Repair an open in the wire between the electric brake booster and the CAN gateway.?
